A Covington construction worker was critically injured Wednesday when he fell from a scaffold while painting the underside of an Interstate 75 overpass in Ohio, authorities said.

Edmond Gourdon, 45, of Covington, fell from scaffolding along Kyle Station Road in Westchester, Ohio, about 4 p.m., Sgt. James Russell of the Hamilton County post of the Ohio State Highway Patrol. Gourdon sustained a serious head injury in the fall and was still in critical condition Thursday afternoon, Russell said.

The U.S. Occupational Safety and Health Administration is investigating the accident, Russell said.

A similar accident occurred last year while workers were painting an overpass about two miles from where Gourdon fell, Russell said. In that case, the worker was not wearing a safety harness that connects to the scaffolding, he said.